scholarly journals Microstructural and Thermomechanical Simulation of the Additive Manufacturing Process in 316L Austenitic Stainless Steel

2021 ◽  
Vol 3 (1) ◽  
pp. 20
Author(s):  
Marios P. Sotiriou ◽  
John S. Aristeidakis ◽  
Maria-Ioanna T. Tzini ◽  
Ioanna Papadioti ◽  
Gregory N. Haidemenopoulos ◽  
...  
Keyword(s):  
Finite Element ◽  
Stainless Steel ◽  
Additive Manufacturing ◽  
Austenitic Stainless Steel ◽  
Temporal And Spatial Distribution ◽  
Element Analysis ◽  
Thermomechanical Simulation ◽  
316L Austenitic Stainless Steel ◽  
Microstructural Modelling ◽  
Element Technique

Additive manufacturing of an AISI 316L austenitic stainless steel was studied via an integrated thermomechanical and microstructural modelling approach. A finite element technique was employed to evaluate the temperature evolution due to successive material deposition. Heat transfer simulations provided the temperature field history, required to determine the microstructural evolution. Thermodynamic and kinetic simulations were employed to calculate temporal and spatial distribution of phases and alloying elements upon solidification and subsequent thermal cycling. The ensuing microstructural properties could be provided as an input for a mechanical finite element analysis to calculate, based on local mechanical properties, the residual stresses and distortions.

scholarly journals Finite Element Analysis on the Temperature- Dependent Burst Behavior of Domed 316L Austenitic Stainless Steel Rupture Disc

Metals ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 232
Author(s):  
Hongbo Zhu ◽  
Weipu Xu ◽  
Zhiping Luo ◽  
Hongxing Zheng
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Burst Pressure ◽  
Temperature Dependent ◽  
Element Analysis ◽  
Rupture Disc ◽  
316L Austenitic Stainless Steel ◽  
Increasing Temperature

As a safety device, a rupture disc instantly bursts as a nonreclosing pressure relief component to minimize the explosion risk once the internal pressure of vessels or pipes exceeds a critical level. In this study, the influence of temperature on the ultimate burst pressure of domed rupture discs made of 316L austenitic stainless steel was experimentally investigated and assessed with finite element analysis. Experimental results showed that the ultimate burst pressure gradually reduced from 6.88 MPa to 5.24 MPa with increasing temperature from 300 K to 573 K, which are consistent with the predicted instability pressures acquired by nonlinear buckling analysis using ABAQUS software. Additionally, it was found that a gradual transition from opening ductile mode to cleavage mode happened with increasing temperature due to more cross slips occurring under serious plastic deformation. The equivalent stress, equivalent strain and strain hardening rates acquired by static analysis were effective at rationalizing the temperature-dependent fracture behavior of the domed rupture discs.

Numerical Analysis of Constrained Groove Pressing and Mechanical Behaviour of Processed 316L Stainless Steel

2019 ◽  
Vol 969 ◽  
pp. 901-908 ◽  
Author(s):  
Rahul Singh ◽  
Gaurav Rajan ◽  
B. Kranthi Kumar ◽  
Raviraj Verma ◽  
Dharmendra Singh ◽  
...  
Keyword(s):  
Finite Element ◽  
Stainless Steel ◽  
Element Analysis ◽  
Austenitic Phase ◽  
Hardness Tests ◽  
Ultrafine Grained ◽  
316L Austenitic Stainless Steel ◽  
Measured Strain ◽  
3D Software ◽  
Deform 3D

Among several existing and well established severe plastic deformation techniques, constrained groove pressing (CGP) is one of the prominent and trusted routes for producing ultrafine grained materials. In the present work medical grade 316L austenitic stainless steel sheet of 3 mm thickness was subjected to CGP up to two cycles. Samples obtained as a result of processing were investigated both experimentally and numerically through finite element (FE) analysis using DEFORM-3D software. XRD study revealed the transformation of austenitic phase to martensitic phase. Tensile and hardness tests were conducted to see the effect of processing on mechcanical properties. The ultimate tensile strength increases with the number of CGP passes from 767 (solution annealed) to 1162 MPa (after 2 cycles), similarly, yield strength increases from 269 (as received) to 328 MPa (after 2 cycles). Finite element analysis showed an imposed strain of 2.30 with standard deviation of 0.31 after two cycle of CGP is in coordination with experimental measured strain of 2.32.

Block Shear Behaviors of Angle Two-Bolted Connections with Austenitic Stainless Steel – Experiment and Finite Element Analysis

2013 ◽  
Vol 658 ◽  
pp. 350-353
Author(s):  
Tae Soo Kim ◽  
Min Seung Kim ◽  
Sung Woo Shin
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Ultimate Strength ◽  
Strength Reduction ◽  
Test Results ◽  
Bolted Connections ◽  
Element Analysis ◽  
Block Shear

Since stainless steel has significant characteristics such as its superior corrosion resistance, durability, aesthetic appeal etc., it has been utilized as structural members in buildings. Recently, ultimate behaviors and curling influence in austenitic stainless steel single shear bolted connections with thin-walled plane plates have been investigated by T.S. Kim. In this paper, finite element analysis (FEA) has been conducted based on the existing test results of angle bolted connections in fabricated with austenitic stainless steel. The validation of the numerical analysis prediction was verified through the comparison of test results for fracture mode, ultimate strength and curling occurrence. Curling (out-of- plane deformation) also observed in the connections with a long end distance. The curling caused the ultimate strength reduction and the ultimate strength reduction ratios (varied from 12% to 25%) caused by curling have been estimated quantitatively through the comparison of FEA results of FE models with free edge and restrained curling.

Numerical and Experimental Investigations on Deposition of Stainless Steel in Wire Arc Additive Manufacturing

2021 ◽  
Vol 11 (4) ◽  
pp. 40-56
Author(s):  
Ashish Kumar ◽  
Kuntal Maji
Keyword(s):  
Finite Element ◽  
Stainless Steel ◽  
Additive Manufacturing ◽  
Temperature Distribution ◽  
Wall Structure ◽  
Experimental Investigations ◽  
Transient Temperature ◽  
Element Analysis ◽  
Transient Temperature Distribution ◽  
Wire Arc Additive Manufacturing

This paper presents numerical and experimental investigations on wire arc additive manufacturing for deposition of 430L ferritic stainless steel. Finite element analysis was used to predict temperature distribution for deposition of multiple layers in wire arc additive manufacturing. The transient temperature distribution and predicted by finite element simulation was in good agreement with the experimental results. A wall type structure was fabricated by deposition of multiple layers vertically, and deposited material was characterized by tensile testing and microstructure study. The microstructure of the deposited wall structure was investigated through optical microscopy and scanning electron microscopy (SEM) with EDS. The microstructure of deposited material was changed from fine cellular grains structure to columnar dendrites structure with the formation of secondary arm. It was found that the YS, UTS, and EL of the deposition direction were better than the build direction. The mechanical properties of the WAAM manufactured material was found comparable to that of the wire metal.

scholarly journals Hybrid Additive Manufacturing of Collector Coins

2020 ◽  
Vol 4 (4) ◽  
pp. 115
Author(s):  
João P. M. Pragana ◽  
Stephan Rosenthal ◽  
Ivo M. F. Bragança ◽  
Carlos M. A. Silva ◽  
A. Erman Tekkaya ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Stainless Steel ◽  
Additive Manufacturing ◽  
Metal Cutting ◽  
Geometric Features ◽  
Aisi 316L ◽  
Element Analysis ◽  
Steel Aisi ◽  
Stainless Steel Aisi

The objective of this paper is to present a new hybrid additive manufacturing route for fabricating collector coins with complex, intricate contoured holes. The new manufacturing route combines metal deposition by additive manufacturing with metal cutting and forming, and its application is illustrated with an example consisting of a prototype coin made from stainless steel AISI 316L. Experimentation and finite element analysis of the coin minting operation with the in-house computer program i-form show that the blanks produced by additive manufacturing and metal cutting can withstand the high compressive pressures that are attained during the embossing and impressing of lettering and other reliefs on the coin surfaces. The presentation allows concluding that hybrid additive manufacturing opens the way to the production of innovative collector coins with geometric features that are radically different from those that are currently available in the market.

Finite Element Analysis and Mechanical Behavior of 316L Stainless Steel Processed by Room Temperature Rolling

2019 ◽  
Vol 969 ◽  
pp. 508-516 ◽  
Author(s):  
Rahul Singh ◽  
Surya Deo Yadav ◽  
Nikhil Malviya ◽  
Sunkulp Goel ◽  
R. Jayaganthan ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Room Temperature ◽  
Magnetic Measurements ◽  
Solution Treatment ◽  
Element Analysis ◽  
Room Temperature Rolling

The present work deals with plastic deformation of 316L austenitic stainless steel (ASS) using room temperature rolling process. After solution treatment (annealing) as-received 316L ASS has been rolled for up to 90% of thickness reduction. To investigate the effect of processing on mechanical properties microstructural study, tensile and hardness tests have been conducted. The ultimate tensile strength has been improved from 767 MPa (before deformation) to 1420 MPa (after 90% deformation), and hardness value has been increased from 208 VHN (before deformation) to 449 VHN (after 90% reduction). Magnetic measurements and XRD characterization have been performed to confirm the formation of martensitic phase. Finite element analysis have also been simulated employing DEFORM-3D software to get the insight about deformation behavior. Keywords: Room temperature rolling, Finite Element Analysis, Mechanical properties, Austenitic stainless steel.

Finite Element Modelling of Welded Austenitic Stainless Steel Plate With 8-Passes

2014 ◽  
Author(s):  
V. I. Patel ◽  
O. Muránsky ◽  
C. J. Hamelin ◽  
M. D. Olson ◽  
M. R. Hill ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Heat Source ◽  
Steel Plate ◽  
Contour Method ◽  
Thermal Loads ◽  
Stainless Steel Plate ◽  
Element Analysis

The current paper presents a finite element analysis of an eight-pass groove weld in a 316L austenitic stainless steel plate. A dedicated welding heat source modelling tool was employed to produce volumetric body power density data for each weld pass, thus simulating weld-induced thermal loads. Thermocouple measurements and cross-weld macrographs taken from a weld specimen were used for heat source calibration. A mechanical finite element analysis was then conducted, using the calibrated thermal loads and a Lemaitre-Chaboche mixed work-hardening model. The predicted post-weld residual stresses were validated using contour method measurements: good agreement between measured and simulated residual stress fields was observed. A sensitivity analysis was also conducted to identify the boundary conditions that best represent a tack-welded I-beam support, which was present on the specimen back-face during the welding.

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